$ git clone -n https://src.fedoraproject.org/rpms/powdertoy.git /var/lib/mock/f40-build-795328-140108/root/chroot_tmpdir/scmroot/powdertoy
Cloning into '/var/lib/mock/f40-build-795328-140108/root/chroot_tmpdir/scmroot/powdertoy'...
$ git fetch origin a4dd074b7efae35d47ac6354a19de5f15a86bee0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/powdertoy
 * [new ref]         a4dd074b7efae35d47ac6354a19de5f15a86bee0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4dd074 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild